Elasmobranchii (haaien en roggen) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Sphyrnidae (Hammerhead, bonnethead, or scoophead sharks)
Etymology: Sphyrna: Probable misspelling of sphyra (Gr.), hammer, referring to their hammer-shaped heads. (See ETYFish); media: Latin for middle, allusion not explained, probably referring to its oculonarial expanse being “roughly intermediate in shape between that of hammerheads [subgenus Sphyrna] and shovelheads [subgenus Platysqualus]”. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien demersaal; diepte 8 - ? m (Ref. 58018). Tropical; 35°N - 34°S, 118°W - 31°W
Western Atlantic: Panama to southern Brazil. Eastern Pacific: Gulf of California to Ecuador and probably northern Peru.
Grootte / Gewicht / Leeftijd
Maturity: Lm ?  range ? - ? cm
Max length : 150 cm TL mannelijk / geslacht onbekend; (Ref. 5217); common length : 100.0 cm TL mannelijk / geslacht onbekend; (Ref. 5217)
Little-known. Found in inshore areas over the continental shelves. Viviparous (Ref. 50449). Utilized fresh for human consumption and for fishmeal.
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Viviparous, placental (Ref. 50449).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Traumatogenic
Gebruik door de mens
Visserij: van minder commercieel belang
Tools
Speciale rapporten
Download XML
Internetbronnen
Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5029 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00347 (0.00157 - 0.00767), b=3.12 (2.93 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 4.0 ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).